/* ************************************************************************
 *  * Copyright (C) 2016-2022 Advanced Micro Devices, Inc. All rights reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell cop-
 * ies of the Software, and to permit persons to whom the Software is furnished
 * to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IM-
 * PLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNE-
 * CTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 *  *
 *  * ************************************************************************ */
#include "rocblas_trtri.hpp"
#include "logging.hpp"
#include "rocblas_block_sizes.h"
#include "utility.hpp"

namespace
{
    template <typename>
    constexpr char rocblas_trtri_name[] = "unknown";
    template <>
    constexpr char rocblas_trtri_name<float>[] = "rocblas_strtri";
    template <>
    constexpr char rocblas_trtri_name<double>[] = "rocblas_dtrtri";
    template <>
    constexpr char rocblas_trtri_name<rocblas_float_complex>[] = "rocblas_ctrtri";
    template <>
    constexpr char rocblas_trtri_name<rocblas_double_complex>[] = "rocblas_ztrtri";

    template <rocblas_int NB, typename T>
    rocblas_status rocblas_trtri_impl(rocblas_handle   handle,
                                      rocblas_fill     uplo,
                                      rocblas_diagonal diag,
                                      rocblas_int      n,
                                      const T*         A,
                                      rocblas_int      lda,
                                      T*               invA,
                                      rocblas_int      ldinvA)
    {
        if(!handle)
            return rocblas_status_invalid_handle;

        size_t size = rocblas_internal_trtri_temp_size<NB>(n, 1) * sizeof(T);
        if(handle->is_device_memory_size_query())
        {
            if(!n)
                return rocblas_status_size_unchanged;
            return handle->set_optimal_device_memory_size(size);
        }

        auto layer_mode     = handle->layer_mode;
        auto check_numerics = handle->check_numerics;

        if(layer_mode & rocblas_layer_mode_log_trace)
            log_trace(handle, rocblas_trtri_name<T>, uplo, diag, n, A, lda, invA, ldinvA);

        if(layer_mode & rocblas_layer_mode_log_profile)
            log_profile(handle,
                        rocblas_trtri_name<T>,
                        "uplo",
                        rocblas_fill_letter(uplo),
                        "diag",
                        rocblas_diag_letter(diag),
                        "N",
                        n,
                        "lda",
                        lda,
                        "ldinvA",
                        ldinvA);

        rocblas_status arg_status
            = rocblas_trtri_arg_check(handle, uplo, diag, n, A, lda, invA, ldinvA, 1);
        if(arg_status != rocblas_status_continue)
            return arg_status;

        auto w_mem = handle->device_malloc(size);
        if(!w_mem)
            return rocblas_status_memory_error;

        if(check_numerics)
        {
            bool           is_input = true;
            rocblas_status trtri_check_numerics_status
                = rocblas_trtri_check_numerics(rocblas_trtri_name<T>,
                                               handle,
                                               uplo,
                                               n,
                                               A,
                                               lda,
                                               0,
                                               invA,
                                               ldinvA,
                                               0,
                                               1,
                                               check_numerics,
                                               is_input);
            if(trtri_check_numerics_status != rocblas_status_success)
                return trtri_check_numerics_status;
        }

        rocblas_status status = rocblas_status_success;

        status = rocblas_internal_trtri_template<NB, false, false, T>(handle,
                                                                      uplo,
                                                                      diag,
                                                                      n,
                                                                      A,
                                                                      0,
                                                                      lda,
                                                                      lda * n,
                                                                      0,
                                                                      invA,
                                                                      0,
                                                                      ldinvA,
                                                                      ldinvA * n,
                                                                      0,
                                                                      1,
                                                                      1,
                                                                      (T*)w_mem);

        if(status != rocblas_status_success)
            return status;

        if(check_numerics)
        {
            bool           is_input = false;
            rocblas_status trtri_check_numerics_status
                = rocblas_trtri_check_numerics(rocblas_trtri_name<T>,
                                               handle,
                                               uplo,
                                               n,
                                               A,
                                               lda,
                                               0,
                                               invA,
                                               ldinvA,
                                               0,
                                               1,
                                               check_numerics,
                                               is_input);
            if(trtri_check_numerics_status != rocblas_status_success)
                return trtri_check_numerics_status;
        }
        return status;
    }

}

/*
 * ===========================================================================
 *    C interface
 * ===========================================================================
 */

extern "C" {
rocblas_status rocblas_strtri(rocblas_handle   handle,
                              rocblas_fill     uplo,
                              rocblas_diagonal diag,
                              rocblas_int      n,
                              const float*     A,
                              rocblas_int      lda,
                              float*           invA,
                              rocblas_int      ldinvA)
try
{
    return rocblas_trtri_impl<ROCBLAS_TRTRI_NB>(handle, uplo, diag, n, A, lda, invA, ldinvA);
}
catch(...)
{
    return exception_to_rocblas_status();
}

rocblas_status rocblas_dtrtri(rocblas_handle   handle,
                              rocblas_fill     uplo,
                              rocblas_diagonal diag,
                              rocblas_int      n,
                              const double*    A,
                              rocblas_int      lda,
                              double*          invA,
                              rocblas_int      ldinvA)
try
{
    return rocblas_trtri_impl<ROCBLAS_TRTRI_NB>(handle, uplo, diag, n, A, lda, invA, ldinvA);
}
catch(...)
{
    return exception_to_rocblas_status();
}

rocblas_status rocblas_ctrtri(rocblas_handle               handle,
                              rocblas_fill                 uplo,
                              rocblas_diagonal             diag,
                              rocblas_int                  n,
                              const rocblas_float_complex* A,
                              rocblas_int                  lda,
                              rocblas_float_complex*       invA,
                              rocblas_int                  ldinvA)
try
{
    return rocblas_trtri_impl<ROCBLAS_TRTRI_NB>(handle, uplo, diag, n, A, lda, invA, ldinvA);
}
catch(...)
{
    return exception_to_rocblas_status();
}

rocblas_status rocblas_ztrtri(rocblas_handle                handle,
                              rocblas_fill                  uplo,
                              rocblas_diagonal              diag,
                              rocblas_int                   n,
                              const rocblas_double_complex* A,
                              rocblas_int                   lda,
                              rocblas_double_complex*       invA,
                              rocblas_int                   ldinvA)
try
{
    return rocblas_trtri_impl<ROCBLAS_TRTRI_NB>(handle, uplo, diag, n, A, lda, invA, ldinvA);
}
catch(...)
{
    return exception_to_rocblas_status();
}

} // extern "C"
